Matthew Poole and continuators on Leviticus 1:9

9 But the inwards and his legs, shall he wash in water, and the Priest shall burn all on the Altar, to be a burnt-sacrifice, an offering made by fire of a sweet savour unto the LORD.

To signify the universal and perfect purity both of the inwards, or the heart, and of the legs, or ways or actions, which was in Christ, and which should be in all Christians.

Not onely the parts, now mentioned, but all the rest, the trunck of the body and the shoulders, as is apparent from the practise or execution of these precepts.

Not in it self▪ for so it rather caused a stink, but as it represented Christs offering up himself, to God as a sweet smelling savour, Eph. 5. 2. and to admonish us of the excellent vertue of Divine institution, without which God values no worship, though never so glorious, and by which even the meanest things are pretious and acceptable to God.